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  • 1
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    Global forecasts for forest products to the year 2000: Implications for Australia (1982)
    Canberra : Periodicals Archive Online (PAO)
    Quarterly review of the rural economy. 4:2 (1982:May) 140 
    Details
    ISSN: 0156-7446
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Economics
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:6017-1982-004-02-000004
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  • 2
    Electronic Resource
    Electronic Resource
    Phospholipids Containing Photoactivable Groups in Studies of Biological Membranes (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 346 (1980), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1980.tb22099.x
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  • 3
    Electronic Resource
    Electronic Resource
    Direct measurement of denitrification in a Prosopis (Mesquite) dominated Sonoran Desert ecosystem (1982)
    Springer
    Oecologia 53 (1982), S. 120-122 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Denitrification was directly measured using the acetylene inhibition technique in a Sonoran Desert ecosystem dominated by Prosopis glandulosa. Soil under Prosopis and from the unvegetated area between Prosopis was wetted with 50 mm of water and denitrification measured for 48 hours. The mean denitrification rate under Prosopis was 11.6 g N ha-1h-1 compared to only 0.2 g N ha-1h-1 away from Prosopis. The denitrification response to wetting was rapid and rates peaked about 24 h after water application.The much higher denitrification under Prosopis probably results from high available organic C under Prosopis, but other soil chemical and physical changes effected by Prosopis may influence denitrification rates. About 0.5 kg N ha-1 of Prosopis cover may be lost from this ecosystem by denitrification after infrequent major rainfalls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377145
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  • 4
    Electronic Resource
    Electronic Resource
    Natural 15N abundance of presumed N2-fixing and non-N2-fixing plants from selected ecosystems (1982)
    Springer
    Oecologia 54 (1982), S. 317-325 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The 15N/14N ratios of plant and soil samples from Northern California ecosystems were determined by mass spectrometry. The 15N abundance of 176 plant foliar samples averaged 0.0008 atom % 15N excess relative to atmospheric N2 and ranged from-0.0028 to 0.0064 atom % 15N excess relative to atmospheric N2. Foliage from reported N2-fixing species had significantly lower mean 15N abundance (relative to atmospheric N2 and total soil N) and significantly higher N concentration (% N dry wt.) than did presumed non-N2-fixing plants growing on the same sites. The mean difference between N2-fixing species and other plants was 0.0007 atom % 15N. N2-fixing species had lower 15N abundance than the other plants on most sites examined despite large differences between sites in vegetation, soil, and climate. The mean 15N abundance of N2-fixing plants varied little between sites and was close to that of atmospheric N2. The 15N abundance of presumed non-N2-fixing species was highest at coastal sites and may reflect an input of marine spray N having relatively high 15N abundance. The 15N abundance of N2-fixing species was not related to growth form but was for other plants. Annual herbaceous plants had highest 15N abundance followed in decreasing order by perennial herbs, shrubs, and trees. Several terrestrial ferns (Pteridaceae) had 15N abundances comparable to N2-fixing legumes suggesting N2-fixation by these ferns. On sites where the 15N abundance of soil N differs from that of the atmosphere, N2-fixing plants can be identified by the natural 15N abundance of their foliage. This approach can be useful in detecting and perhaps measuring N2-fixation on sites where direct recovery of nodules is not possible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00380000
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  • 5
    Electronic Resource
    Electronic Resource
    Modelling of the enzymatic hydrolysis of cellobiose and cellulose by a complex enzyme mixture of Trichoderma reesei QM 9414 (1984)
    Springer
    Applied microbiology and biotechnology 20 (1984), S. 176-182 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The enzymatic hydrolysis of cellobiose and cellulose by the cell-free culture filtrate of Trichoderma reesei QM 9414 was investigated. The concentrations of cellobiose and glucose were measured as a function of time for different initial concentrations of cellobiose. It was not possible to describe these concentration variations by a model which considers only the cellobiase hydrolysis with competitive and noncompetitive substrate and product inhibition; it is necessary that the endo-β-1.4-glucanase with competitive product inhibition is also taken into account. The enzymatic hydrolysis of cellulose (Avicel) was described with a mathematical model by using the results of the decomposition of cellobiose by the same enzyme mixture. the identified model parameters are presented. A sensitivity analysis of the parameter was carried out also.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00253727
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  • 6
    Electronic Resource
    Electronic Resource
    Protein-depleted chromosomes (1981)
    Springer
    Chromosoma 81 (1981), S. 537-555 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Protein-depleted isolated Chinese hamster chromosomes have been obtained by different protein extraction procedures and examined by electron microscopy and SDS-polyacrylamide gel electrophoresis. Salt-resistant centromeric and telomeric structures are visible in protein-depleted chromosomes and the protein-depleted chromosomes appear to have a regular, longitudinal pattern in critical point dried preparations. The scaffold-like structure of protein-depleted chromosomes is highly affected by the ionic strength and composition of the extraction medium and by the spreading conditions. Nucleosomal histones of isolated chromosomes proved to be more sensitive to the sodium chloride treatment than histones of isolated chromatin. A small, but constant quantity of core histones was detected in 2 M salt extracted chromosomes and H3 and H4 histones of isolated chromosomes appeared to be resistant to the sodium deoxycholate treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285848
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  • 7
    Electronic Resource
    Electronic Resource
    Use of ultrasonically modulated electron resonance to study S-state ions in mineral crystals: Mn2+, Fe3+, in tremolite (1982)
    Springer
    Physics and chemistry of minerals 8 (1982), S. 200-205 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract The use of ultrasonically modulated electron resonance (UMER) to study S-state ions in substitutional sites of mineral single crystals is discussed. Mn2+ and Fe3+ in natural single crystals of tremolite are used as examples. Combined electron paramagnetic resonance (EPR) and UMER measurements establish almost certainly that Mn2+ enters predominantly into the distorted M4 sites occupied by Ca2+ in the ideal tremolite structure and only to a minor extent into the M1, M2 and M3 sites normally occupied by Mg2+. Fe3+ in tremolite gives rise to the well known high spin resonance with g eff≃4.3 but there is considerable uncertainty as to the site of the impurity ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309478
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  • 8
    Electronic Resource
    Electronic Resource
    Protein-depleted chromosomes (1981)
    Springer
    Chromosoma 81 (1981), S. 557-567 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Chromosome scaffolds are chromosome-shaped bodies, composed of non-histone proteins, which remain when the histones are extracted from chromosomes. Because of the well-known tendency of chromosomal proteins to aggregate, we have tested the possibility that chromosome scaffolds might be produced by aggregation of proteins during the preparation of scaffolds. Extraction of histones in the presence of sucrose, which inhibits aggregation, results in a much looser structure lacking the characteristic appearance of a scaffold, although sucrose does not extract any extra proteins. Extraction of histones from chromosomes in situ on EM grids produced only a network of fine fibres without a scaffold-like structure, while digestion of DNA from typical chromosome scaffolds in situ left only discrete particles of protein and not a continuous structure. We conclude, therefore, that the typical appearance of chromosome scaffolds produced by histone extraction may well represent an artefact resulting from protein aggregation. Our experiments suggest further that DNA, as well as protein, is a structural component of whatever type of core structure is responsible for maintaining the form of chromosome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285849
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  • 9
    Electronic Resource
    Electronic Resource
    Book reviews (1982)
    Springer
    Higher education 11 (1982), S. 485-496 
    Details
    ISSN: 1573-174X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Nature of Science, Research, Systems of Higher Education, Museum Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00157661
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  • 10
    Electronic Resource
    Electronic Resource
    Book reviews (1984)
    Springer
    Higher education 13 (1984), S. 339-346 
    Details
    ISSN: 1573-174X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Nature of Science, Research, Systems of Higher Education, Museum Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00128829
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